Explosive.



STATE YATENT @FFECE.

JOSEPH SAYERS, WALTER ATKINSON WILSON,

AND JAMES THORBURN, OF ARDEER,

SCOTLAND, ASSIGNORS TO E. I. DU FONT DE NEIVIOURS POWDER COMPANY, OF \VIL- MING-TON, DELAWARE, A CORPORATION OF NEW JERSEY.

No Drawing. Driginal application filed November 15, 1910, Serial No. 592,535.

tion filed April 26, 1911.

toluol, trinitro-toluol, etc., and various at tempts have already been made to utilize this property in the production of explosives which will not be liable to freeze at low temperatures. As appears from patent literature, it has also been proposed, in preparing various explosive mixtures, to incorporate with these ingredients suitable oxidizing agents and in certain cases also suitable combustibles of'which wood-meal is one of those recommended. Starting from this standpoint, we have aimed at incorporating in a blasting explosive a sufficiently large proportion of nitro bodies soluble in nitroglycerin to secure the desired result without rendering the explosive too insensible to detonation, and have adjusted the proportions of the other ingredients present, particularly of the oxidizing agent, 0. 9., perchlorate of potash, and of the combustible, e. 9.,

wood-meal, with the result that we have suc;'

ceeded in producing compositions of high explosive power which remains substan- V tially undiminished at low temperatures. The said compositions consist of nitro-glycerin having dissolved therein a mixture of nitro bodies, viz :mono-nitro-naphthalene, di-nitro-toluol, tri-nitro-toluol, soluble in large proportions, constituting a solution which remains unfrozen at low temperatures; the solution being gelatinized or not in known manner by addition of nitro-cotton or nitro-starch, and the solution or jelly being mixed. with an oxidizing agent such as perchlorate of potassium or of sodium or of ammonium or a mixture of such perchlorates, or in lieu of or as well as the perchlorate or perchlorates, one or more of the corresponding nitrates, or chlorates, and with a Specification of Letters Patent.

Patented June 13, 1911.

Divided and this applica- Serial No. 623,449.

combustible which is also absorbent, such for instance, as wood-meal, flour, bran or the like, with or Without the addition of graphite, magnesium carbonate, chalk or the like. The proportions of the aforesaid ingredients which we have found to be most suitable are as follows:

Nitro-glycerin 23. 83 Nitr0c0tton 1. 60 Mono-nitro-naphthalene 1. 09 Di-nitro-toluol 3. 27 Trinitro-toluol 5. 83 Potassium perchl0rate 52.35 Wood-meal (dry) 12.00

, (2.) Nitro-glycerin 18. 89 Nitro-cotton Y 1. 27 Mono-nitro-naphthalene 0. 87 Di-nitro-toluol 2. 60 Tri-nitro-toluol 4. 62 Potassium perchlorate 58. 75 VVood-meal 9. 51 Magnesium carbonate 0. 50 Graphite 2. 99

100. O0 Nitro-glycerin 17. 20 Nitro-cotton 1. 3 1 Mono-nitro-naphthalene 1. 20 Dinitro-toluol 3. 59 Tri-nitro-toluol 6. 37 Potassium chlorate 60.30 \Vood-meal 10, O0

Nitro-glycerin 16. 00 Nitro-cotton 1. 24 Mono-nitro-naphthalene 1. 1O Di-nitro-toluol 3. 34 Tri-nitro-toluol 5. 92 Ammonium nitrate 69.90 T Wood-meal 2. 50

N'itro-glycerin 15. 8O 1V[ono-nitro-naphthalene 1. 10 Di-nitro-toluol 3. 8O Tri-nitro-toluol 5. 80 Potassium nitrate 11. O0 Wood-meal 32. 00 'Chalk 5 0 -Wood-meal in example (4), viz :2.50,

which approximates to the proportion of Wood-meal used in known explosives of a different characterholds good only for that particular example. i

WVe do not herein claim the compounds set forth in the examples, With the exception of the hereinafter claimed compound, as such other compounds form the subject matter of separate applications.

This application is a division of applica tion Serial No. 592,535, filed November 15, 1910.

We do not claim in this application the proportions of the compositions set out herein under the headings (1), (2), (3) and (4) as the same are claimed in applications Serial No. 592,535, filed November 15, 1910, and'Serial Nos. 623, 146, 40 623,447 and 623,448, filed April 26,1911.

Having now fully described our invention, What We claim and desire to protect by Letters Patent is":

'An explosive compound comprising nitroglycerin 15.80 per cent, mono-nitro-naphthalene 1.10 per cent., di-nitro-toluol 3.80 per cent, tri-nitro-toluol 5.80 per cent, p0- tassium nitrate 41.00 per cent, Wood-meal 32 per cent, andchalk .50 per cent.

In testimony of which invention, We have hereunto set our hands, at Glasgow, Scotland, andNanaimo, Canada, respectively, on this 15th day of Feby. and 20th day of March, 1911.

JOSEPH SAYERS. WALTER ATKINSON WILSON. JAMES THORBURN.

W'itnesses:

J OHN MCCLEARY, THOMAS BISHOP DRAPER, E. EYRES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

